Learning about Language教学设计(教案)

Unit3

“Computers”教学设计

教材分析

This is the last teaching period of this unit, aiming to help students get a basic knowledge of the grammar in this unit.The emphasis of this period is mainly placed on the usages of the grammar.Therefore, teachers should create a relatively real context or offer simple sentences for students to draw a conclusion about the present perfect passive voice. In the meantime, some important usages that we should pay attention to will be mentioned in this unit. Exercises designed ought to be simple and easy to operate, which is of great help to students' understanding.

教学目标

1.Help students to memorize different forms of the present perfect passive voice. 2.Enable students to use a correct form to use the present perfect passive voice in a given situation.

教学重点

Enable students to understand the structure and the usages of the present perfect passive voice./ 教学难点

Enable students to use the correct form to express the present perfect passive voice in a given situation. 教学过程

Step1呈现新知

Lead-in T: Hello, everybody! Are you familiar with these computers? And now let's enjoy some pictures about specially-designed computers. Can you call them? Show some pictures) Ss: Desktop PC, laptop/notebook, palmtop T: Good. Now let's enjoy these pictures and pay attention to what I say (Show some pictures.A wrist-worn PC has been invented recently.A pen-like computer has already been developed.The new campus of No I Middle School has already been built.The houses have been destroyed by the storm.According to the sentences above.what do you think we will learn today. Ss: The present perfect passive voice. T: Yeah, clever! That's the exact point we will learn today

Step2感受新知

1, Find and read the following sentences in your text and pay attention to the underlined parts. 1)

Over time I have been changed quite a lot 2)

...,I have been used in offices and homes since the 1970s. 3)

.., I never forget anything I have been told. 4)

Since the 1970s. many new applications have been found for me. 5)

I have also been put into robots and used to make mobile phones as well as help with medical operations.

2.Let students translate the sentences into Chinese and pay attention to different forms of the present perfect passive voice. (1)

Two windows have been broken (2)

The car has not been repaired. (3)

-Have the cars been repaired

一No, they haven't (4)

How long has her work been finished? (5)

Suggested answers:1.两个窗子被打破了2.汽车还没有修好这些汽车修好了吗?不,还没有4.她的工作完成多久了? 3.Conclusion of the rule: 一、现在完成时的被动语态的结构:have/ has been done 二、现在完成时被动语态的各种句式

肯定式: have/has+been+done 否定式: have/has+not+been+done 疑问式: Have/Has+主语t+been+done 特殊疑问式: 疑间词+ have/has+not+been+done 三、使用现在完成时的被动语态要注意以下几点

(1)现在完成时的被动语态的两个助动词,即have/has和been两者缺一不可

(2)只有及物动词才有被动语态,不及物动词(词组)没有被动语态,如:happen,take place,die,disappear,fail,remain,lie,stand,break out,come true,belong to等。

(3)副词的位置如 often, usually, always, never, hardly,seldom等置于have/has和been中间。

(4)许多不及物动词加介词或副词构成的短语动词,相当于及物动词,也可以有被动语态,但短语动词是一个不可分割的整体,变为被动语态时,不可丢掉构成短语的介词或副词,如:A notice has been put up on the wall. (5)非延续性动词,如 borrow, finish, begin, start,buy,marry,open,join等构成的现在完成时的被动语态不能与表示一段时间的状语连用,若要表达相应的意思,则要改换动词或时态。

Step3巩固运用

1.

完成句子

1.由于大雪,高速公路已经被封闭。

The free way ______because of the heavy snow. 2.

对不起,先生,这次展览的门票已经全部卖完。

Sorry,sir,all the tickets for the exhibition______. 3.

为了多种一些谷物,很多树被砍掉了。

Large numbers of trees______to grow more again. 4.我喜欢这部科幻电影,它已经在电视上播了三次了。

I like this science fiction film and it________three times on TV. Suggested answers: 1. has been closed.2 have been sold out 3. have been cut down4. has been broadcast 2.单项填空

1. His sister left home in 1998, and______since.

A had not been heard of

B has not been heard of C had not heard of

D has not heard of 2. The new dictionaries are very useful. They_____well and______already.

A. sell: have been sold out

B sold: had sold out C. sell: sell out

D, are sold: have been sold out 3.--Can we sit at the table near the window?-I'm sorry, but it_____already.

A, was taken

B took

C has taken

D has been taken 4. I want to buy this kind of cloth because I____the cloth____

well. A. have told: washed

B have been told: washes C have been told: washed

D was told: washed Suggested answers: 1. B 2. A 3. D 4. B Step4拓展

I. Correct the following sentences and conclude the important usages of the passive voice. Show them on the screen. .1.A personal computer has bought by us. 2. What has been happened to you? 3. Our computer just has been joined to the Internet. 4. The child has been taken good care by Grandma Wang all these years. 5. How long has the book been borrowed? Suggested answers:1. A personal computer has been bought by us2. What has happened to you?3. Our computer has just been joined to the Internet4. The child has been taken good care of by Grandma Wang all these years5. How long has the book been kept? Ⅱ. Consolidation 1.用括号内动词或词组的适当形式填空

(1)More than 5,000 used bikes_____(collect)since the two brothers set up the organization. (2)Since the cause of this disease_______(discover), now we need to develop the medicine to treat it. (3)Over the past ten years. this town______(hit)twice by earthquakes. (4)-Will the lecture be held at 4 o' clock this afternoon? No. It_______(put off) till tomorrow afternoon. (5)Her novel is very popular among people of all ages: so far it______(translate)

into 25 languages. Suggested answers:(1) have been collected(2)has been discovered(3)has been hit(4)has been put off(5)has been translated 2.单项填空

(1)All the preparations for the task_____and we are ready to start. A. completed

B. complete

C .had been completed

D.have been done (2)-How long______at this job?Since 1990. A. were you been employed

B.have you been employed C.had you been employed

D.will you been employed

(3)When and where to go for the on-salary holiday______yet. A.are not decided

B.have not been decided

C is not being decided

D has not been decided (4)Betty_____injured since last Saturday. A.has been

B. was

C.is

D.

has

(5)That book______into at least 20 foreign languages. A has said to be translated

B has been said to have translated C is said that it had been translated

D is said to have been translated (6)-Did you move into the new house? No. The rooms______yet. A were being painted

B are painting

C have not painted

D, have not been painted Suggested answers: (1)D (2)B(3)D(4)A(5)D(6)D

课堂小结

in this period,we have learned the present passive voice.Pay attention to the structures when you use them.

课后作业

Recite the sentences from the test,revise the present perfect passive voice after class and try to grasp the different forms.